Cryptography – Particular algorithmic function encoding – Nbs/des algorithm
Patent
1994-02-01
1995-05-30
Cain, David C.
Cryptography
Particular algorithmic function encoding
Nbs/des algorithm
380 4, 380 21, 380 30, H04K 100
Patent
active
054209277
ABSTRACT:
A method for certifying public keys of a digital signature scheme in a secure communications system is provided. The secure communications system in one in which there are authorities with previously-certified public verification keys. The method begins by having a user U present an authority a verification key PK.sub.U. The authority then identifies the presenting user as U. Thereafter, the authority verifies that the presenting user knows the secret signing key associated with PK.sub.U. If so, the authority computes a digital signature S relative to the authority's own public key PK.sub.A of its verification that PK.sub.U is the public key of user U. The authority then issues a certificate that PK.sub.U is the public key of user U, the certificate including both S and a certificate for PK.sub.A.
REFERENCES:
patent: 4326098 (1982-04-01), Bouricious et al.
patent: 5214702 (1993-05-01), Fischer
patent: 5261002 (1993-11-01), Perlman et al.
patent: 5299263 (1994-03-01), Beller et al.
patent: 5307411 (1994-04-01), Anvret et al.
Cain David C.
Judson David H.
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